Friction-brake for window-sashes



A. THEYSKENS.

FRiCTION BRAKE FOR WINDOW SASHES.

APPLICATION FILED JULY 19.1920

1,366,972. Patented Feb. 1,1921

UNITED STATES ALPHONSE THEYSKENS, 0F TESTELT, BELGIUM.

FRTCTION-BRAKEE) FOB W'INDUW-SASHE S.

specification of Letters Patent.

Patented Feb. 11., tutti...

Application filed July 19, 1920. Serial No. 397,333.

1 '0 all whom "it may concern Be it known that I, Anrrionsn THEY- SKENS, manufacturer, a citizen of the Kingdom of Belgium, and resident of Testelt, Belgium, have invented certain new and useful Improvements in Friction-Brakes for l/Vindowtlashes; and I do hereby declare the following to be a full, clear, and exact description oi the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked therein, which form a part of this specification.

The present invention relates to a friction brake capable of being utilized for the wedging of window sashes, in. a determined position, while permitting easy displace ment of the parts.

This result is obtained. according to a device previously known by the employment of two brake shoes arranged on both sides of the part on which friction is operative and constantly urged by a spring or by gravity to approach one another to effect the locking, unlocking being obtained by means of devices producing a separation of the shoes when they are actuated by hand or when they meet appropriate abutments after a certain displacement.

According to the present invention, in the case of a window sash for a railway carriage door the two brake shoes form two vertical sides oi a deformable parallelogram suspended i'rom above and in the interior of which is compressed the sash to be wedged up.

The drawing shows by way of example different forms of carrying out the invention.

Figure l is a front view of the window frame, Fig. 2 is a section oi the line A, B of l ig. 1 Fig. 3 a section on a larger scale on line -D of Fig. 1. Figs. 1 to 7 show details on a larger scale.

The frame of the sash 1 is surrounded by a pivoted parallelogram composed of two brake shoes 2 and 8 which are intended. to bear frictionally or rub directly upon the frame 1 and by the cross-pieces 4. The parallelogram is suspended at one of its angles by means of two springs 5 and 6, the first of which is attached to a lever 7 pivoted at 8 to some stationary point and at 9 to a shoe 3 while the second is attached to a lever 1.0, one end ct which. is pivoted at a fixed point while the other is located beneath a button 11 of the shoe 3.

The "parallelogram bein suspei'i the top tends to lose its iorni undo action of its own weight; which may be partially counterbalanced. by a spring lit and to wedge the frame It between its sides 3 and 2 forming brake shoes. Upon operating the frame i from the top downward it descends carrying along with it the whole parallelogram, against the action of the suspensory springs, until the moment at which the shoe 2 encounters a rigid abut-- ment 13; the shoe continues the movement alone which causes the deformation. oi the parallelogram thus permitting a sliding movement of the frame; the in 1 then descencs alonesustaining a frictional break ing action produced by the springs 3 and 6. As soon as action. upon the frame l is ceased, the parts automatically resume the wedging position. lit on the contrary an effort from the bottom upward be exerted upon the frame 1, the parallelogram is also dragged along until the shoes come in contact with the abutment 14;; then the trains will only carry along the shoe 2 and the unlocking effect is produced as in the preceding case, the braking effect being in this case regulated by the weight of the parts, partially balanced by the spring 12. During the ascent of the parallelogram the action of the spring 6 is cut oil at the end of a certain space of time by the abutment of its lever 10 against a button 15.

The combined action of the springs 5 and 12 may be replaced by the action of a single spring the strength of which is equal to the sum of the two springs 5 and 12, and is applied at a suitable point of one oi the crosspieces 4-.

In the form of the construction according to Fig. 3 the frame 1 carries an iron facing 16 engaging between two plates 17 of the frame of the window and carrying a friction device of wood, fiber, etc, 18; the brake shoes have then the form of a U-shaped piece of iron.

T he guiding of the parallelogram is completed by levers such as 19 having the same length as lever 7 and by rods or bars 20 provided at their two ends with ball and socket joints in the brake shoes 2 or 3 and the fixed frame 21 of the window (F igs. 2 and 5). i

[ill

This stationary or fixed frame 21 carries at its lower part a gutter or channel 22, Figs. 2'and 6; the slot requisite for the passage of the frame is formed by a plate with a pivotal spring 23 conducting the water into the gutter or channel 22.

In the form of the construction according to Fig. 7 the shoes 2 and 3 carry arms, upon which there acttwo buttons 24 made in one with a lever not shown, which permits of the release of the shoes; this arrangement is usedwhen a powerful braking eflect is desired.

Vfhat 1 claim is:

l. A frictional brake device for the window sash of a door, comprising a pivoted parallelogram surrounding the sash, the two vertical sides of said parallelogram forming the brake shoes, means for suspending the parallelogram at one or its apexes to the door by the aid of springs, fixed abutment upon the door above the suspension apex of the parallelogram and another ixed abutment beneath the opposed apex of the parallelogram.

2. A frictional brake device for the window sash of a door, comprising pivoted parallelogram surrounding the sash, the two vertical sides of said parallelogram forming the brake shoes, means for suspending the parallelogram-at one of its apexes to the door by the aid of two springs, one of which has an action restricted to the lower portion of the upward movement of the suspension apex, a fixed abutment upon the door above the suspension apex of the parallelogram and another fixed abutment beneath the opposed apex of the parallelogram.

it :r'rictional brake device for the window sash oi a door, comprising a pivoted parallelogram surrounding the sash, the two vertical sides oi said parallelogram forming the brake shoes, and being U-shaped so as to guide the sash, means for suspending the parallelogram at one of its apexes to I the door by the aid of springs, a fixed abutment upon the door above the suspension apex of the parallelogram and another fixed abutment beneath the opposed apex of the parallelogram.

l A trictional brake device for the win dow sash 01' a door, comprising a pivoted parallelogram nounding the sash, the two vertical sides of said parallelogram forming the brake shoes, means for suspending the parallelogram at one of its apexes to the door by the aid of springs, a fixed abutment upon the door above the suspension apex of the parallelogram and another fixed abutment beneath the opposed apex of the parallelogram and a spring attached to that vertical side of the parallelogram that is not connected to the suspension apex, for the purpose of partially counterweighting the weight of the parallelogram.

Ln testimony whereof I allix my signature in presence of two witnesses.

ALPHONSE THEYSKENS.

lVitnesses LoUIs TRnTs, .los. LAURTIEN. 

